Fastener



FIG. 1 is an enlarged exploded perspective view of a front, top, and right side of a fastener, the exploded perspective view of the rear, top, and left side being identical thereto;

FIG. 2 is a perspective view of a front, top, and right side of the fastener of FIG. 1, the perspective view of the rear, top, and right side being a mirror image thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is another environmental front elevational view thereof.

The fastener of FIGS. 1-4 includes portions illustrated in dash-dash-dash lines for the purpose of illustrating unclaimed subject matter that forms no part of the claimed design. FIGS. 2-4 include additional dash-dash-dash lines that are included for the purpose of illustrating unclaimed environmental structure, which forms no part of the claimed design. 

CLAIM The ornamental design for a fastener, as shown and described. 